Thanks for the query.
Having a black vaginal bleeding is not specific to pregnancy. It may be indicative of a vaginal infection or even an early miscarriage, the symptoms of sore breasts, nausea could be related to pregnancy or even a premenstrual symptom. In case you have had an intercourse in the present cycle and have missed your next cycle, you may do a urine pregnancy test to rule out pregnancy. Consider seeing a gynecologist for further examination and investigations, the doctor may wish to get a few tests done and an ultrasound examination may be needed.
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